Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 | 2 | BlueZ - Bluetooth protocol stack for Linux |
2d0a0346 | 3 | Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. |
1da177e4 LT |
4 | |
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth HCI connection handling. */ | |
26 | ||
8c520a59 | 27 | #include <linux/export.h> |
1da177e4 LT |
28 | |
29 | #include <net/bluetooth/bluetooth.h> | |
30 | #include <net/bluetooth/hci_core.h> | |
31 | ||
ac4b7236 | 32 | #include "smp.h" |
7024728e MH |
33 | #include "a2mp.h" |
34 | ||
2dea632f FD |
35 | struct sco_param { |
36 | u16 pkt_type; | |
37 | u16 max_latency; | |
38 | }; | |
39 | ||
40 | static const struct sco_param sco_param_cvsd[] = { | |
41 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a }, /* S3 */ | |
42 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007 }, /* S2 */ | |
43 | { EDR_ESCO_MASK | ESCO_EV3, 0x0007 }, /* S1 */ | |
44 | { EDR_ESCO_MASK | ESCO_HV3, 0xffff }, /* D1 */ | |
45 | { EDR_ESCO_MASK | ESCO_HV1, 0xffff }, /* D0 */ | |
46 | }; | |
47 | ||
48 | static const struct sco_param sco_param_wideband[] = { | |
49 | { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d }, /* T2 */ | |
50 | { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */ | |
51 | }; | |
52 | ||
1aef8669 | 53 | static void hci_le_create_connection_cancel(struct hci_conn *conn) |
fcd89c09 VT |
54 | { |
55 | hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); | |
56 | } | |
57 | ||
1aef8669 | 58 | static void hci_acl_create_connection(struct hci_conn *conn) |
1da177e4 LT |
59 | { |
60 | struct hci_dev *hdev = conn->hdev; | |
61 | struct inquiry_entry *ie; | |
62 | struct hci_cp_create_conn cp; | |
63 | ||
42d2d87c | 64 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
65 | |
66 | conn->state = BT_CONNECT; | |
a0c808b3 | 67 | conn->out = true; |
a8746417 | 68 | |
1da177e4 LT |
69 | conn->link_mode = HCI_LM_MASTER; |
70 | ||
4c67bc74 MH |
71 | conn->attempt++; |
72 | ||
e4e8e37c MH |
73 | conn->link_policy = hdev->link_policy; |
74 | ||
1da177e4 LT |
75 | memset(&cp, 0, sizeof(cp)); |
76 | bacpy(&cp.bdaddr, &conn->dst); | |
77 | cp.pscan_rep_mode = 0x02; | |
78 | ||
70f23020 AE |
79 | ie = hci_inquiry_cache_lookup(hdev, &conn->dst); |
80 | if (ie) { | |
41a96212 MH |
81 | if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { |
82 | cp.pscan_rep_mode = ie->data.pscan_rep_mode; | |
83 | cp.pscan_mode = ie->data.pscan_mode; | |
84 | cp.clock_offset = ie->data.clock_offset | | |
82781e63 | 85 | __constant_cpu_to_le16(0x8000); |
41a96212 MH |
86 | } |
87 | ||
1da177e4 | 88 | memcpy(conn->dev_class, ie->data.dev_class, 3); |
58a681ef JH |
89 | if (ie->data.ssp_mode > 0) |
90 | set_bit(HCI_CONN_SSP_ENABLED, &conn->flags); | |
1da177e4 LT |
91 | } |
92 | ||
a8746417 | 93 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 94 | if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) |
b6a0dc82 | 95 | cp.role_switch = 0x01; |
1da177e4 | 96 | else |
b6a0dc82 | 97 | cp.role_switch = 0x00; |
4c67bc74 | 98 | |
a9de9248 | 99 | hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); |
1da177e4 LT |
100 | } |
101 | ||
1aef8669 | 102 | static void hci_acl_create_connection_cancel(struct hci_conn *conn) |
6ac59344 MH |
103 | { |
104 | struct hci_cp_create_conn_cancel cp; | |
105 | ||
38b3fef1 | 106 | BT_DBG("hcon %p", conn); |
6ac59344 | 107 | |
d095c1eb | 108 | if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2) |
6ac59344 MH |
109 | return; |
110 | ||
111 | bacpy(&cp.bdaddr, &conn->dst); | |
a9de9248 | 112 | hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); |
6ac59344 MH |
113 | } |
114 | ||
93796fa6 CT |
115 | static void hci_reject_sco(struct hci_conn *conn) |
116 | { | |
117 | struct hci_cp_reject_sync_conn_req cp; | |
118 | ||
119 | cp.reason = HCI_ERROR_REMOTE_USER_TERM; | |
120 | bacpy(&cp.bdaddr, &conn->dst); | |
121 | ||
122 | hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp); | |
123 | } | |
124 | ||
bed71748 | 125 | void hci_disconnect(struct hci_conn *conn, __u8 reason) |
1da177e4 LT |
126 | { |
127 | struct hci_cp_disconnect cp; | |
128 | ||
38b3fef1 | 129 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
130 | |
131 | conn->state = BT_DISCONN; | |
132 | ||
aca3192c | 133 | cp.handle = cpu_to_le16(conn->handle); |
1da177e4 | 134 | cp.reason = reason; |
a9de9248 | 135 | hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); |
1da177e4 LT |
136 | } |
137 | ||
53502d69 AE |
138 | static void hci_amp_disconn(struct hci_conn *conn, __u8 reason) |
139 | { | |
140 | struct hci_cp_disconn_phy_link cp; | |
141 | ||
142 | BT_DBG("hcon %p", conn); | |
143 | ||
144 | conn->state = BT_DISCONN; | |
145 | ||
146 | cp.phy_handle = HCI_PHY_HANDLE(conn->handle); | |
147 | cp.reason = reason; | |
148 | hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK, | |
149 | sizeof(cp), &cp); | |
150 | } | |
151 | ||
57f5d0d1 | 152 | static void hci_add_sco(struct hci_conn *conn, __u16 handle) |
1da177e4 LT |
153 | { |
154 | struct hci_dev *hdev = conn->hdev; | |
155 | struct hci_cp_add_sco cp; | |
156 | ||
38b3fef1 | 157 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
158 | |
159 | conn->state = BT_CONNECT; | |
a0c808b3 | 160 | conn->out = true; |
1da177e4 | 161 | |
efc7688b MH |
162 | conn->attempt++; |
163 | ||
aca3192c | 164 | cp.handle = cpu_to_le16(handle); |
a8746417 | 165 | cp.pkt_type = cpu_to_le16(conn->pkt_type); |
1da177e4 | 166 | |
a9de9248 | 167 | hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); |
1da177e4 LT |
168 | } |
169 | ||
2dea632f | 170 | bool hci_setup_sync(struct hci_conn *conn, __u16 handle) |
b6a0dc82 MH |
171 | { |
172 | struct hci_dev *hdev = conn->hdev; | |
173 | struct hci_cp_setup_sync_conn cp; | |
2dea632f | 174 | const struct sco_param *param; |
b6a0dc82 | 175 | |
38b3fef1 | 176 | BT_DBG("hcon %p", conn); |
b6a0dc82 MH |
177 | |
178 | conn->state = BT_CONNECT; | |
a0c808b3 | 179 | conn->out = true; |
b6a0dc82 | 180 | |
efc7688b MH |
181 | conn->attempt++; |
182 | ||
b6a0dc82 | 183 | cp.handle = cpu_to_le16(handle); |
b6a0dc82 | 184 | |
82781e63 AE |
185 | cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40); |
186 | cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40); | |
10c62ddc FD |
187 | cp.voice_setting = cpu_to_le16(conn->setting); |
188 | ||
189 | switch (conn->setting & SCO_AIRMODE_MASK) { | |
190 | case SCO_AIRMODE_TRANSP: | |
2dea632f FD |
191 | if (conn->attempt > ARRAY_SIZE(sco_param_wideband)) |
192 | return false; | |
10c62ddc | 193 | cp.retrans_effort = 0x02; |
2dea632f | 194 | param = &sco_param_wideband[conn->attempt - 1]; |
10c62ddc FD |
195 | break; |
196 | case SCO_AIRMODE_CVSD: | |
2dea632f FD |
197 | if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) |
198 | return false; | |
199 | cp.retrans_effort = 0x01; | |
200 | param = &sco_param_cvsd[conn->attempt - 1]; | |
10c62ddc | 201 | break; |
2dea632f FD |
202 | default: |
203 | return false; | |
10c62ddc | 204 | } |
b6a0dc82 | 205 | |
2dea632f FD |
206 | cp.pkt_type = __cpu_to_le16(param->pkt_type); |
207 | cp.max_latency = __cpu_to_le16(param->max_latency); | |
208 | ||
209 | if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0) | |
210 | return false; | |
211 | ||
212 | return true; | |
b6a0dc82 MH |
213 | } |
214 | ||
2ce603eb | 215 | void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, |
5974e4c4 | 216 | u16 latency, u16 to_multiplier) |
2ce603eb CT |
217 | { |
218 | struct hci_cp_le_conn_update cp; | |
219 | struct hci_dev *hdev = conn->hdev; | |
220 | ||
221 | memset(&cp, 0, sizeof(cp)); | |
222 | ||
223 | cp.handle = cpu_to_le16(conn->handle); | |
224 | cp.conn_interval_min = cpu_to_le16(min); | |
225 | cp.conn_interval_max = cpu_to_le16(max); | |
226 | cp.conn_latency = cpu_to_le16(latency); | |
227 | cp.supervision_timeout = cpu_to_le16(to_multiplier); | |
d66c2950 MH |
228 | cp.min_ce_len = __constant_cpu_to_le16(0x0000); |
229 | cp.max_ce_len = __constant_cpu_to_le16(0x0000); | |
2ce603eb CT |
230 | |
231 | hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); | |
232 | } | |
2ce603eb | 233 | |
a7a595f6 | 234 | void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], |
5974e4c4 | 235 | __u8 ltk[16]) |
a7a595f6 VCG |
236 | { |
237 | struct hci_dev *hdev = conn->hdev; | |
238 | struct hci_cp_le_start_enc cp; | |
239 | ||
38b3fef1 | 240 | BT_DBG("hcon %p", conn); |
a7a595f6 VCG |
241 | |
242 | memset(&cp, 0, sizeof(cp)); | |
243 | ||
244 | cp.handle = cpu_to_le16(conn->handle); | |
245 | memcpy(cp.ltk, ltk, sizeof(cp.ltk)); | |
246 | cp.ediv = ediv; | |
51beabdf | 247 | memcpy(cp.rand, rand, sizeof(cp.rand)); |
a7a595f6 VCG |
248 | |
249 | hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); | |
250 | } | |
a7a595f6 | 251 | |
e73439d8 MH |
252 | /* Device _must_ be locked */ |
253 | void hci_sco_setup(struct hci_conn *conn, __u8 status) | |
254 | { | |
255 | struct hci_conn *sco = conn->link; | |
256 | ||
e73439d8 MH |
257 | if (!sco) |
258 | return; | |
259 | ||
38b3fef1 AE |
260 | BT_DBG("hcon %p", conn); |
261 | ||
e73439d8 MH |
262 | if (!status) { |
263 | if (lmp_esco_capable(conn->hdev)) | |
264 | hci_setup_sync(sco, conn->handle); | |
265 | else | |
266 | hci_add_sco(sco, conn->handle); | |
267 | } else { | |
268 | hci_proto_connect_cfm(sco, status); | |
269 | hci_conn_del(sco); | |
270 | } | |
271 | } | |
272 | ||
53502d69 AE |
273 | static void hci_conn_disconnect(struct hci_conn *conn) |
274 | { | |
275 | __u8 reason = hci_proto_disconn_ind(conn); | |
276 | ||
277 | switch (conn->type) { | |
53502d69 AE |
278 | case AMP_LINK: |
279 | hci_amp_disconn(conn, reason); | |
280 | break; | |
4c02e2d4 | 281 | default: |
bed71748 | 282 | hci_disconnect(conn, reason); |
4c02e2d4 | 283 | break; |
53502d69 AE |
284 | } |
285 | } | |
286 | ||
19c40e3b | 287 | static void hci_conn_timeout(struct work_struct *work) |
1da177e4 | 288 | { |
19c40e3b | 289 | struct hci_conn *conn = container_of(work, struct hci_conn, |
5974e4c4 | 290 | disc_work.work); |
1da177e4 | 291 | |
38b3fef1 | 292 | BT_DBG("hcon %p state %s", conn, state_to_string(conn->state)); |
1da177e4 LT |
293 | |
294 | if (atomic_read(&conn->refcnt)) | |
295 | return; | |
296 | ||
6ac59344 MH |
297 | switch (conn->state) { |
298 | case BT_CONNECT: | |
769be974 | 299 | case BT_CONNECT2: |
fcd89c09 VT |
300 | if (conn->out) { |
301 | if (conn->type == ACL_LINK) | |
1aef8669 | 302 | hci_acl_create_connection_cancel(conn); |
fcd89c09 | 303 | else if (conn->type == LE_LINK) |
1aef8669 | 304 | hci_le_create_connection_cancel(conn); |
93796fa6 CT |
305 | } else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) { |
306 | hci_reject_sco(conn); | |
fcd89c09 | 307 | } |
6ac59344 | 308 | break; |
769be974 | 309 | case BT_CONFIG: |
8e87d142 | 310 | case BT_CONNECTED: |
53502d69 | 311 | hci_conn_disconnect(conn); |
6ac59344 MH |
312 | break; |
313 | default: | |
1da177e4 | 314 | conn->state = BT_CLOSED; |
6ac59344 MH |
315 | break; |
316 | } | |
1da177e4 LT |
317 | } |
318 | ||
416dc94b | 319 | /* Enter sniff mode */ |
a74a84f6 | 320 | static void hci_conn_idle(struct work_struct *work) |
416dc94b | 321 | { |
a74a84f6 JH |
322 | struct hci_conn *conn = container_of(work, struct hci_conn, |
323 | idle_work.work); | |
416dc94b GP |
324 | struct hci_dev *hdev = conn->hdev; |
325 | ||
38b3fef1 | 326 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
416dc94b GP |
327 | |
328 | if (test_bit(HCI_RAW, &hdev->flags)) | |
329 | return; | |
330 | ||
331 | if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) | |
332 | return; | |
333 | ||
334 | if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) | |
335 | return; | |
336 | ||
337 | if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { | |
338 | struct hci_cp_sniff_subrate cp; | |
339 | cp.handle = cpu_to_le16(conn->handle); | |
82781e63 AE |
340 | cp.max_latency = __constant_cpu_to_le16(0); |
341 | cp.min_remote_timeout = __constant_cpu_to_le16(0); | |
342 | cp.min_local_timeout = __constant_cpu_to_le16(0); | |
416dc94b GP |
343 | hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); |
344 | } | |
345 | ||
51a8efd7 | 346 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
416dc94b GP |
347 | struct hci_cp_sniff_mode cp; |
348 | cp.handle = cpu_to_le16(conn->handle); | |
349 | cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); | |
350 | cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); | |
82781e63 AE |
351 | cp.attempt = __constant_cpu_to_le16(4); |
352 | cp.timeout = __constant_cpu_to_le16(1); | |
416dc94b GP |
353 | hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); |
354 | } | |
355 | } | |
356 | ||
7bc18d9d | 357 | static void hci_conn_auto_accept(struct work_struct *work) |
9f61656a | 358 | { |
7bc18d9d JH |
359 | struct hci_conn *conn = container_of(work, struct hci_conn, |
360 | auto_accept_work.work); | |
9f61656a | 361 | |
7bc18d9d | 362 | hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), |
5974e4c4 | 363 | &conn->dst); |
9f61656a JH |
364 | } |
365 | ||
1da177e4 LT |
366 | struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst) |
367 | { | |
368 | struct hci_conn *conn; | |
369 | ||
6ed93dc6 | 370 | BT_DBG("%s dst %pMR", hdev->name, dst); |
1da177e4 | 371 | |
cb601d7e | 372 | conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL); |
04837f64 | 373 | if (!conn) |
1da177e4 | 374 | return NULL; |
1da177e4 LT |
375 | |
376 | bacpy(&conn->dst, dst); | |
662e8820 | 377 | bacpy(&conn->src, &hdev->bdaddr); |
a8746417 MH |
378 | conn->hdev = hdev; |
379 | conn->type = type; | |
380 | conn->mode = HCI_CM_ACTIVE; | |
381 | conn->state = BT_OPEN; | |
93f19c9f | 382 | conn->auth_type = HCI_AT_GENERAL_BONDING; |
17fa4b9d | 383 | conn->io_capability = hdev->io_capability; |
a9583556 | 384 | conn->remote_auth = 0xff; |
13d39315 | 385 | conn->key_type = 0xff; |
1da177e4 | 386 | |
58a681ef | 387 | set_bit(HCI_CONN_POWER_SAVE, &conn->flags); |
052b30b0 | 388 | conn->disc_timeout = HCI_DISCONN_TIMEOUT; |
04837f64 | 389 | |
a8746417 MH |
390 | switch (type) { |
391 | case ACL_LINK: | |
392 | conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; | |
393 | break; | |
394 | case SCO_LINK: | |
395 | if (lmp_esco_capable(hdev)) | |
efc7688b MH |
396 | conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) | |
397 | (hdev->esco_type & EDR_ESCO_MASK); | |
a8746417 MH |
398 | else |
399 | conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK; | |
400 | break; | |
401 | case ESCO_LINK: | |
efc7688b | 402 | conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK; |
a8746417 MH |
403 | break; |
404 | } | |
405 | ||
1da177e4 | 406 | skb_queue_head_init(&conn->data_q); |
04837f64 | 407 | |
70c1f20b | 408 | INIT_LIST_HEAD(&conn->chan_list); |
73d80deb | 409 | |
19c40e3b | 410 | INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout); |
7bc18d9d | 411 | INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept); |
a74a84f6 | 412 | INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle); |
1da177e4 LT |
413 | |
414 | atomic_set(&conn->refcnt, 0); | |
415 | ||
416 | hci_dev_hold(hdev); | |
417 | ||
1da177e4 | 418 | hci_conn_hash_add(hdev, conn); |
3c54711c | 419 | if (hdev->notify) |
1da177e4 LT |
420 | hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); |
421 | ||
a67e899c MH |
422 | hci_conn_init_sysfs(conn); |
423 | ||
1da177e4 LT |
424 | return conn; |
425 | } | |
426 | ||
427 | int hci_conn_del(struct hci_conn *conn) | |
428 | { | |
429 | struct hci_dev *hdev = conn->hdev; | |
430 | ||
38b3fef1 | 431 | BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle); |
1da177e4 | 432 | |
19c40e3b | 433 | cancel_delayed_work_sync(&conn->disc_work); |
7bc18d9d | 434 | cancel_delayed_work_sync(&conn->auto_accept_work); |
a74a84f6 | 435 | cancel_delayed_work_sync(&conn->idle_work); |
9f61656a | 436 | |
5b7f9909 | 437 | if (conn->type == ACL_LINK) { |
1da177e4 LT |
438 | struct hci_conn *sco = conn->link; |
439 | if (sco) | |
440 | sco->link = NULL; | |
441 | ||
442 | /* Unacked frames */ | |
443 | hdev->acl_cnt += conn->sent; | |
6ed58ec5 VT |
444 | } else if (conn->type == LE_LINK) { |
445 | if (hdev->le_pkts) | |
446 | hdev->le_cnt += conn->sent; | |
447 | else | |
448 | hdev->acl_cnt += conn->sent; | |
5b7f9909 MH |
449 | } else { |
450 | struct hci_conn *acl = conn->link; | |
451 | if (acl) { | |
452 | acl->link = NULL; | |
76a68ba0 | 453 | hci_conn_drop(acl); |
5b7f9909 | 454 | } |
1da177e4 LT |
455 | } |
456 | ||
2c33c06a | 457 | hci_chan_list_flush(conn); |
73d80deb | 458 | |
9740e49d AE |
459 | if (conn->amp_mgr) |
460 | amp_mgr_put(conn->amp_mgr); | |
461 | ||
1da177e4 | 462 | hci_conn_hash_del(hdev, conn); |
3c54711c | 463 | if (hdev->notify) |
1da177e4 | 464 | hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); |
7d0db0a3 | 465 | |
1da177e4 | 466 | skb_queue_purge(&conn->data_q); |
1da177e4 | 467 | |
fc225c3f | 468 | hci_conn_del_sysfs(conn); |
2ae9a6be | 469 | |
384943ec MH |
470 | hci_dev_put(hdev); |
471 | ||
8d12356f | 472 | hci_conn_put(conn); |
163f4dab | 473 | |
1da177e4 LT |
474 | return 0; |
475 | } | |
476 | ||
477 | struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src) | |
478 | { | |
479 | int use_src = bacmp(src, BDADDR_ANY); | |
8035ded4 | 480 | struct hci_dev *hdev = NULL, *d; |
1da177e4 | 481 | |
6ed93dc6 | 482 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 483 | |
f20d09d5 | 484 | read_lock(&hci_dev_list_lock); |
1da177e4 | 485 | |
8035ded4 | 486 | list_for_each_entry(d, &hci_dev_list, list) { |
8fc9ced3 | 487 | if (!test_bit(HCI_UP, &d->flags) || |
d300fa9b | 488 | test_bit(HCI_RAW, &d->flags) || |
af750e94 | 489 | test_bit(HCI_USER_CHANNEL, &d->dev_flags) || |
d300fa9b | 490 | d->dev_type != HCI_BREDR) |
1da177e4 LT |
491 | continue; |
492 | ||
8e87d142 | 493 | /* Simple routing: |
1da177e4 LT |
494 | * No source address - find interface with bdaddr != dst |
495 | * Source address - find interface with bdaddr == src | |
496 | */ | |
497 | ||
498 | if (use_src) { | |
499 | if (!bacmp(&d->bdaddr, src)) { | |
500 | hdev = d; break; | |
501 | } | |
502 | } else { | |
503 | if (bacmp(&d->bdaddr, dst)) { | |
504 | hdev = d; break; | |
505 | } | |
506 | } | |
507 | } | |
508 | ||
509 | if (hdev) | |
510 | hdev = hci_dev_hold(hdev); | |
511 | ||
f20d09d5 | 512 | read_unlock(&hci_dev_list_lock); |
1da177e4 LT |
513 | return hdev; |
514 | } | |
515 | EXPORT_SYMBOL(hci_get_route); | |
516 | ||
9bb3c01f | 517 | /* This function requires the caller holds hdev->lock */ |
06c053fb | 518 | void hci_le_conn_failed(struct hci_conn *conn, u8 status) |
9bb3c01f AG |
519 | { |
520 | struct hci_dev *hdev = conn->hdev; | |
521 | ||
522 | conn->state = BT_CLOSED; | |
523 | ||
524 | mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type, | |
525 | status); | |
526 | ||
527 | hci_proto_connect_cfm(conn, status); | |
528 | ||
529 | hci_conn_del(conn); | |
530 | } | |
531 | ||
1d399ae5 AG |
532 | static void create_le_conn_complete(struct hci_dev *hdev, u8 status) |
533 | { | |
534 | struct hci_conn *conn; | |
535 | ||
536 | if (status == 0) | |
537 | return; | |
538 | ||
539 | BT_ERR("HCI request failed to create LE connection: status 0x%2.2x", | |
540 | status); | |
541 | ||
542 | hci_dev_lock(hdev); | |
543 | ||
544 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
545 | if (!conn) | |
546 | goto done; | |
547 | ||
06c053fb | 548 | hci_le_conn_failed(conn, status); |
1d399ae5 AG |
549 | |
550 | done: | |
551 | hci_dev_unlock(hdev); | |
552 | } | |
553 | ||
2acf3d90 AG |
554 | static void hci_req_add_le_create_conn(struct hci_request *req, |
555 | struct hci_conn *conn) | |
556 | { | |
557 | struct hci_cp_le_create_conn cp; | |
558 | struct hci_dev *hdev = conn->hdev; | |
559 | u8 own_addr_type; | |
560 | ||
561 | memset(&cp, 0, sizeof(cp)); | |
562 | ||
563 | /* Update random address, but set require_privacy to false so | |
564 | * that we never connect with an unresolvable address. | |
565 | */ | |
566 | if (hci_update_random_address(req, false, &own_addr_type)) | |
567 | return; | |
568 | ||
569 | /* Save the address type used for this connnection attempt so we able | |
570 | * to retrieve this information if we need it. | |
571 | */ | |
572 | conn->src_type = own_addr_type; | |
573 | ||
574 | cp.scan_interval = cpu_to_le16(hdev->le_scan_interval); | |
575 | cp.scan_window = cpu_to_le16(hdev->le_scan_window); | |
576 | bacpy(&cp.peer_addr, &conn->dst); | |
577 | cp.peer_addr_type = conn->dst_type; | |
578 | cp.own_address_type = own_addr_type; | |
579 | cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); | |
580 | cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); | |
581 | cp.supervision_timeout = __constant_cpu_to_le16(0x002a); | |
582 | cp.min_ce_len = __constant_cpu_to_le16(0x0000); | |
583 | cp.max_ce_len = __constant_cpu_to_le16(0x0000); | |
584 | ||
585 | hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); | |
586 | } | |
587 | ||
588 | static void stop_scan_complete(struct hci_dev *hdev, u8 status) | |
589 | { | |
590 | struct hci_request req; | |
591 | struct hci_conn *conn; | |
592 | int err; | |
593 | ||
594 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
595 | if (!conn) | |
596 | return; | |
597 | ||
598 | if (status) { | |
599 | BT_DBG("HCI request failed to stop scanning: status 0x%2.2x", | |
600 | status); | |
601 | ||
602 | hci_dev_lock(hdev); | |
603 | hci_le_conn_failed(conn, status); | |
604 | hci_dev_unlock(hdev); | |
605 | return; | |
606 | } | |
607 | ||
608 | /* Since we may have prematurely stopped discovery procedure, we should | |
609 | * update discovery state. | |
610 | */ | |
611 | cancel_delayed_work(&hdev->le_scan_disable); | |
612 | hci_discovery_set_state(hdev, DISCOVERY_STOPPED); | |
613 | ||
614 | hci_req_init(&req, hdev); | |
615 | ||
616 | hci_req_add_le_create_conn(&req, conn); | |
617 | ||
618 | err = hci_req_run(&req, create_le_conn_complete); | |
619 | if (err) { | |
620 | hci_dev_lock(hdev); | |
621 | hci_le_conn_failed(conn, HCI_ERROR_MEMORY_EXCEEDED); | |
622 | hci_dev_unlock(hdev); | |
623 | return; | |
624 | } | |
625 | } | |
626 | ||
d04aef4c VCG |
627 | static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, |
628 | u8 dst_type, u8 sec_level, u8 auth_type) | |
1da177e4 | 629 | { |
4292f1f3 | 630 | struct hci_conn_params *params; |
f1e5d547 | 631 | struct hci_conn *conn; |
1ebfcc1f | 632 | struct smp_irk *irk; |
2acf3d90 | 633 | struct hci_request req; |
1d399ae5 | 634 | int err; |
1da177e4 | 635 | |
f3d3444a | 636 | if (test_bit(HCI_ADVERTISING, &hdev->flags)) |
f1550478 JH |
637 | return ERR_PTR(-ENOTSUPP); |
638 | ||
620ad521 AG |
639 | /* Some devices send ATT messages as soon as the physical link is |
640 | * established. To be able to handle these ATT messages, the user- | |
641 | * space first establishes the connection and then starts the pairing | |
642 | * process. | |
643 | * | |
644 | * So if a hci_conn object already exists for the following connection | |
645 | * attempt, we simply update pending_sec_level and auth_type fields | |
646 | * and return the object found. | |
647 | */ | |
f1e5d547 | 648 | conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); |
620ad521 AG |
649 | if (conn) { |
650 | conn->pending_sec_level = sec_level; | |
651 | conn->auth_type = auth_type; | |
652 | goto done; | |
653 | } | |
dfc94dbd | 654 | |
620ad521 AG |
655 | /* Since the controller supports only one LE connection attempt at a |
656 | * time, we return -EBUSY if there is any connection attempt running. | |
657 | */ | |
658 | conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT); | |
659 | if (conn) | |
660 | return ERR_PTR(-EBUSY); | |
46a190cb | 661 | |
1ebfcc1f JH |
662 | /* Convert from L2CAP channel address type to HCI address type */ |
663 | if (dst_type == BDADDR_LE_PUBLIC) | |
664 | dst_type = ADDR_LE_DEV_PUBLIC; | |
665 | else | |
666 | dst_type = ADDR_LE_DEV_RANDOM; | |
667 | ||
edb4b466 MH |
668 | /* When given an identity address with existing identity |
669 | * resolving key, the connection needs to be established | |
670 | * to a resolvable random address. | |
671 | * | |
672 | * This uses the cached random resolvable address from | |
673 | * a previous scan. When no cached address is available, | |
674 | * try connecting to the identity address instead. | |
675 | * | |
676 | * Storing the resolvable random address is required here | |
677 | * to handle connection failures. The address will later | |
678 | * be resolved back into the original identity address | |
679 | * from the connect request. | |
680 | */ | |
1ebfcc1f JH |
681 | irk = hci_find_irk_by_addr(hdev, dst, dst_type); |
682 | if (irk && bacmp(&irk->rpa, BDADDR_ANY)) { | |
683 | dst = &irk->rpa; | |
684 | dst_type = ADDR_LE_DEV_RANDOM; | |
685 | } | |
686 | ||
620ad521 AG |
687 | conn = hci_conn_add(hdev, LE_LINK, dst); |
688 | if (!conn) | |
689 | return ERR_PTR(-ENOMEM); | |
9f0caeb1 | 690 | |
1ebfcc1f | 691 | conn->dst_type = dst_type; |
e7c4096e | 692 | |
620ad521 AG |
693 | conn->state = BT_CONNECT; |
694 | conn->out = true; | |
695 | conn->link_mode |= HCI_LM_MASTER; | |
696 | conn->sec_level = BT_SECURITY_LOW; | |
f1e5d547 AG |
697 | conn->pending_sec_level = sec_level; |
698 | conn->auth_type = auth_type; | |
4292f1f3 AG |
699 | |
700 | params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); | |
701 | if (params) { | |
702 | conn->le_conn_min_interval = params->conn_min_interval; | |
703 | conn->le_conn_max_interval = params->conn_max_interval; | |
704 | } else { | |
705 | conn->le_conn_min_interval = hdev->le_conn_min_interval; | |
706 | conn->le_conn_max_interval = hdev->le_conn_max_interval; | |
707 | } | |
eda42b50 | 708 | |
2acf3d90 AG |
709 | hci_req_init(&req, hdev); |
710 | ||
711 | /* If controller is scanning, we stop it since some controllers are | |
712 | * not able to scan and connect at the same time. | |
713 | */ | |
714 | if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) { | |
715 | hci_req_add_le_scan_disable(&req); | |
716 | err = hci_req_run(&req, stop_scan_complete); | |
717 | } else { | |
718 | hci_req_add_le_create_conn(&req, conn); | |
719 | err = hci_req_run(&req, create_le_conn_complete); | |
720 | } | |
721 | ||
722 | if (err) { | |
723 | hci_conn_del(conn); | |
620ad521 | 724 | return ERR_PTR(err); |
2acf3d90 | 725 | } |
fcd89c09 | 726 | |
620ad521 AG |
727 | done: |
728 | hci_conn_hold(conn); | |
f1e5d547 | 729 | return conn; |
d04aef4c | 730 | } |
fcd89c09 | 731 | |
db474275 VCG |
732 | static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst, |
733 | u8 sec_level, u8 auth_type) | |
1da177e4 LT |
734 | { |
735 | struct hci_conn *acl; | |
fcd89c09 | 736 | |
56f87901 JH |
737 | if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) |
738 | return ERR_PTR(-ENOTSUPP); | |
739 | ||
70f23020 AE |
740 | acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
741 | if (!acl) { | |
742 | acl = hci_conn_add(hdev, ACL_LINK, dst); | |
743 | if (!acl) | |
48c7aba9 | 744 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
745 | } |
746 | ||
747 | hci_conn_hold(acl); | |
748 | ||
09ab6f4c | 749 | if (acl->state == BT_OPEN || acl->state == BT_CLOSED) { |
765c2a96 JH |
750 | acl->sec_level = BT_SECURITY_LOW; |
751 | acl->pending_sec_level = sec_level; | |
09ab6f4c | 752 | acl->auth_type = auth_type; |
1aef8669 | 753 | hci_acl_create_connection(acl); |
09ab6f4c | 754 | } |
1da177e4 | 755 | |
db474275 VCG |
756 | return acl; |
757 | } | |
758 | ||
10c62ddc FD |
759 | struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst, |
760 | __u16 setting) | |
db474275 VCG |
761 | { |
762 | struct hci_conn *acl; | |
763 | struct hci_conn *sco; | |
764 | ||
e660ed6c | 765 | acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
db474275 | 766 | if (IS_ERR(acl)) |
5b7f9909 | 767 | return acl; |
1da177e4 | 768 | |
70f23020 AE |
769 | sco = hci_conn_hash_lookup_ba(hdev, type, dst); |
770 | if (!sco) { | |
771 | sco = hci_conn_add(hdev, type, dst); | |
772 | if (!sco) { | |
76a68ba0 | 773 | hci_conn_drop(acl); |
48c7aba9 | 774 | return ERR_PTR(-ENOMEM); |
1da177e4 | 775 | } |
5b7f9909 | 776 | } |
1da177e4 | 777 | |
5b7f9909 MH |
778 | acl->link = sco; |
779 | sco->link = acl; | |
1da177e4 | 780 | |
5b7f9909 | 781 | hci_conn_hold(sco); |
1da177e4 | 782 | |
10c62ddc FD |
783 | sco->setting = setting; |
784 | ||
5b7f9909 | 785 | if (acl->state == BT_CONNECTED && |
5974e4c4 | 786 | (sco->state == BT_OPEN || sco->state == BT_CLOSED)) { |
58a681ef | 787 | set_bit(HCI_CONN_POWER_SAVE, &acl->flags); |
14b12d0b | 788 | hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON); |
c390216b | 789 | |
51a8efd7 | 790 | if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) { |
e73439d8 | 791 | /* defer SCO setup until mode change completed */ |
51a8efd7 | 792 | set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags); |
e73439d8 MH |
793 | return sco; |
794 | } | |
795 | ||
796 | hci_sco_setup(acl, 0x00); | |
b6a0dc82 | 797 | } |
5b7f9909 MH |
798 | |
799 | return sco; | |
1da177e4 | 800 | } |
1da177e4 | 801 | |
b7d839bf VCG |
802 | /* Create SCO, ACL or LE connection. */ |
803 | struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, | |
804 | __u8 dst_type, __u8 sec_level, __u8 auth_type) | |
805 | { | |
6ed93dc6 | 806 | BT_DBG("%s dst %pMR type 0x%x", hdev->name, dst, type); |
b7d839bf | 807 | |
4cd2d983 VCG |
808 | switch (type) { |
809 | case LE_LINK: | |
b7d839bf | 810 | return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type); |
4cd2d983 | 811 | case ACL_LINK: |
b7d839bf | 812 | return hci_connect_acl(hdev, dst, sec_level, auth_type); |
4cd2d983 | 813 | } |
b7d839bf | 814 | |
4cd2d983 | 815 | return ERR_PTR(-EINVAL); |
b7d839bf VCG |
816 | } |
817 | ||
e7c29cb1 MH |
818 | /* Check link security requirement */ |
819 | int hci_conn_check_link_mode(struct hci_conn *conn) | |
820 | { | |
38b3fef1 | 821 | BT_DBG("hcon %p", conn); |
e7c29cb1 | 822 | |
aa64a8b5 | 823 | if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT)) |
e7c29cb1 MH |
824 | return 0; |
825 | ||
826 | return 1; | |
827 | } | |
e7c29cb1 | 828 | |
1da177e4 | 829 | /* Authenticate remote device */ |
0684e5f9 | 830 | static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 831 | { |
38b3fef1 | 832 | BT_DBG("hcon %p", conn); |
1da177e4 | 833 | |
765c2a96 JH |
834 | if (conn->pending_sec_level > sec_level) |
835 | sec_level = conn->pending_sec_level; | |
836 | ||
96a31833 | 837 | if (sec_level > conn->sec_level) |
765c2a96 | 838 | conn->pending_sec_level = sec_level; |
96a31833 | 839 | else if (conn->link_mode & HCI_LM_AUTH) |
1da177e4 LT |
840 | return 1; |
841 | ||
65cf686e JH |
842 | /* Make sure we preserve an existing MITM requirement*/ |
843 | auth_type |= (conn->auth_type & 0x01); | |
844 | ||
96a31833 MH |
845 | conn->auth_type = auth_type; |
846 | ||
51a8efd7 | 847 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 848 | struct hci_cp_auth_requested cp; |
b7d05bad PH |
849 | |
850 | /* encrypt must be pending if auth is also pending */ | |
851 | set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags); | |
852 | ||
aca3192c | 853 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 854 | hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, |
5974e4c4 | 855 | sizeof(cp), &cp); |
19f8def0 | 856 | if (conn->key_type != 0xff) |
51a8efd7 | 857 | set_bit(HCI_CONN_REAUTH_PEND, &conn->flags); |
1da177e4 | 858 | } |
8c1b2355 | 859 | |
1da177e4 LT |
860 | return 0; |
861 | } | |
1da177e4 | 862 | |
13d39315 WR |
863 | /* Encrypt the the link */ |
864 | static void hci_conn_encrypt(struct hci_conn *conn) | |
865 | { | |
38b3fef1 | 866 | BT_DBG("hcon %p", conn); |
13d39315 | 867 | |
51a8efd7 | 868 | if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) { |
13d39315 WR |
869 | struct hci_cp_set_conn_encrypt cp; |
870 | cp.handle = cpu_to_le16(conn->handle); | |
871 | cp.encrypt = 0x01; | |
872 | hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), | |
5974e4c4 | 873 | &cp); |
13d39315 WR |
874 | } |
875 | } | |
876 | ||
8c1b2355 | 877 | /* Enable security */ |
0684e5f9 | 878 | int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) |
1da177e4 | 879 | { |
38b3fef1 | 880 | BT_DBG("hcon %p", conn); |
1da177e4 | 881 | |
d8343f12 VCG |
882 | if (conn->type == LE_LINK) |
883 | return smp_conn_security(conn, sec_level); | |
884 | ||
13d39315 | 885 | /* For sdp we don't need the link key. */ |
8c1b2355 MH |
886 | if (sec_level == BT_SECURITY_SDP) |
887 | return 1; | |
888 | ||
13d39315 WR |
889 | /* For non 2.1 devices and low security level we don't need the link |
890 | key. */ | |
aa64a8b5 | 891 | if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn)) |
3fdca1e1 | 892 | return 1; |
8c1b2355 | 893 | |
13d39315 WR |
894 | /* For other security levels we need the link key. */ |
895 | if (!(conn->link_mode & HCI_LM_AUTH)) | |
896 | goto auth; | |
897 | ||
7b5a9241 MH |
898 | /* An authenticated FIPS approved combination key has sufficient |
899 | * security for security level 4. */ | |
900 | if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 && | |
901 | sec_level == BT_SECURITY_FIPS) | |
902 | goto encrypt; | |
903 | ||
904 | /* An authenticated combination key has sufficient security for | |
905 | security level 3. */ | |
906 | if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 || | |
907 | conn->key_type == HCI_LK_AUTH_COMBINATION_P256) && | |
908 | sec_level == BT_SECURITY_HIGH) | |
13d39315 WR |
909 | goto encrypt; |
910 | ||
911 | /* An unauthenticated combination key has sufficient security for | |
912 | security level 1 and 2. */ | |
66138ce8 MH |
913 | if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 || |
914 | conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) && | |
5974e4c4 | 915 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW)) |
13d39315 WR |
916 | goto encrypt; |
917 | ||
918 | /* A combination key has always sufficient security for the security | |
919 | levels 1 or 2. High security level requires the combination key | |
920 | is generated using maximum PIN code length (16). | |
921 | For pre 2.1 units. */ | |
922 | if (conn->key_type == HCI_LK_COMBINATION && | |
7b5a9241 MH |
923 | (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW || |
924 | conn->pin_length == 16)) | |
13d39315 WR |
925 | goto encrypt; |
926 | ||
927 | auth: | |
51a8efd7 | 928 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) |
1da177e4 LT |
929 | return 0; |
930 | ||
6fdf658c LAD |
931 | if (!hci_conn_auth(conn, sec_level, auth_type)) |
932 | return 0; | |
13d39315 WR |
933 | |
934 | encrypt: | |
935 | if (conn->link_mode & HCI_LM_ENCRYPT) | |
936 | return 1; | |
8c1b2355 | 937 | |
13d39315 | 938 | hci_conn_encrypt(conn); |
1da177e4 LT |
939 | return 0; |
940 | } | |
8c1b2355 | 941 | EXPORT_SYMBOL(hci_conn_security); |
1da177e4 | 942 | |
b3b1b061 WR |
943 | /* Check secure link requirement */ |
944 | int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level) | |
945 | { | |
38b3fef1 | 946 | BT_DBG("hcon %p", conn); |
b3b1b061 | 947 | |
9cb2e030 MH |
948 | /* Accept if non-secure or higher security level is required */ |
949 | if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS) | |
950 | return 1; | |
b3b1b061 | 951 | |
9cb2e030 MH |
952 | /* Accept if secure or higher security level is already present */ |
953 | if (conn->sec_level == BT_SECURITY_HIGH || | |
954 | conn->sec_level == BT_SECURITY_FIPS) | |
b3b1b061 WR |
955 | return 1; |
956 | ||
9cb2e030 MH |
957 | /* Reject not secure link */ |
958 | return 0; | |
b3b1b061 WR |
959 | } |
960 | EXPORT_SYMBOL(hci_conn_check_secure); | |
961 | ||
1da177e4 LT |
962 | /* Change link key */ |
963 | int hci_conn_change_link_key(struct hci_conn *conn) | |
964 | { | |
38b3fef1 | 965 | BT_DBG("hcon %p", conn); |
1da177e4 | 966 | |
51a8efd7 | 967 | if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) { |
1da177e4 | 968 | struct hci_cp_change_conn_link_key cp; |
aca3192c | 969 | cp.handle = cpu_to_le16(conn->handle); |
40be492f | 970 | hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, |
5974e4c4 | 971 | sizeof(cp), &cp); |
1da177e4 | 972 | } |
8c1b2355 | 973 | |
1da177e4 LT |
974 | return 0; |
975 | } | |
1da177e4 LT |
976 | |
977 | /* Switch role */ | |
8c1b2355 | 978 | int hci_conn_switch_role(struct hci_conn *conn, __u8 role) |
1da177e4 | 979 | { |
38b3fef1 | 980 | BT_DBG("hcon %p", conn); |
1da177e4 LT |
981 | |
982 | if (!role && conn->link_mode & HCI_LM_MASTER) | |
983 | return 1; | |
984 | ||
51a8efd7 | 985 | if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) { |
1da177e4 LT |
986 | struct hci_cp_switch_role cp; |
987 | bacpy(&cp.bdaddr, &conn->dst); | |
988 | cp.role = role; | |
a9de9248 | 989 | hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp); |
1da177e4 | 990 | } |
8c1b2355 | 991 | |
1da177e4 LT |
992 | return 0; |
993 | } | |
994 | EXPORT_SYMBOL(hci_conn_switch_role); | |
995 | ||
04837f64 | 996 | /* Enter active mode */ |
14b12d0b | 997 | void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) |
04837f64 MH |
998 | { |
999 | struct hci_dev *hdev = conn->hdev; | |
1000 | ||
38b3fef1 | 1001 | BT_DBG("hcon %p mode %d", conn, conn->mode); |
04837f64 MH |
1002 | |
1003 | if (test_bit(HCI_RAW, &hdev->flags)) | |
1004 | return; | |
1005 | ||
14b12d0b JG |
1006 | if (conn->mode != HCI_CM_SNIFF) |
1007 | goto timer; | |
1008 | ||
58a681ef | 1009 | if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active) |
04837f64 MH |
1010 | goto timer; |
1011 | ||
51a8efd7 | 1012 | if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { |
04837f64 | 1013 | struct hci_cp_exit_sniff_mode cp; |
aca3192c | 1014 | cp.handle = cpu_to_le16(conn->handle); |
a9de9248 | 1015 | hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp); |
04837f64 MH |
1016 | } |
1017 | ||
1018 | timer: | |
1019 | if (hdev->idle_timeout > 0) | |
a74a84f6 JH |
1020 | queue_delayed_work(hdev->workqueue, &conn->idle_work, |
1021 | msecs_to_jiffies(hdev->idle_timeout)); | |
04837f64 MH |
1022 | } |
1023 | ||
1da177e4 LT |
1024 | /* Drop all connection on the device */ |
1025 | void hci_conn_hash_flush(struct hci_dev *hdev) | |
1026 | { | |
1027 | struct hci_conn_hash *h = &hdev->conn_hash; | |
3c4e0df0 | 1028 | struct hci_conn *c, *n; |
1da177e4 LT |
1029 | |
1030 | BT_DBG("hdev %s", hdev->name); | |
1031 | ||
3c4e0df0 | 1032 | list_for_each_entry_safe(c, n, &h->list, list) { |
1da177e4 LT |
1033 | c->state = BT_CLOSED; |
1034 | ||
9f5a0d7b | 1035 | hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM); |
1da177e4 LT |
1036 | hci_conn_del(c); |
1037 | } | |
1038 | } | |
1039 | ||
a9de9248 MH |
1040 | /* Check pending connect attempts */ |
1041 | void hci_conn_check_pending(struct hci_dev *hdev) | |
1042 | { | |
1043 | struct hci_conn *conn; | |
1044 | ||
1045 | BT_DBG("hdev %s", hdev->name); | |
1046 | ||
1047 | hci_dev_lock(hdev); | |
1048 | ||
1049 | conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2); | |
1050 | if (conn) | |
1aef8669 | 1051 | hci_acl_create_connection(conn); |
a9de9248 MH |
1052 | |
1053 | hci_dev_unlock(hdev); | |
1054 | } | |
1055 | ||
1da177e4 LT |
1056 | int hci_get_conn_list(void __user *arg) |
1057 | { | |
fc5fef61 | 1058 | struct hci_conn *c; |
1da177e4 LT |
1059 | struct hci_conn_list_req req, *cl; |
1060 | struct hci_conn_info *ci; | |
1061 | struct hci_dev *hdev; | |
1da177e4 LT |
1062 | int n = 0, size, err; |
1063 | ||
1064 | if (copy_from_user(&req, arg, sizeof(req))) | |
1065 | return -EFAULT; | |
1066 | ||
1067 | if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci)) | |
1068 | return -EINVAL; | |
1069 | ||
1070 | size = sizeof(req) + req.conn_num * sizeof(*ci); | |
1071 | ||
70f23020 AE |
1072 | cl = kmalloc(size, GFP_KERNEL); |
1073 | if (!cl) | |
1da177e4 LT |
1074 | return -ENOMEM; |
1075 | ||
70f23020 AE |
1076 | hdev = hci_dev_get(req.dev_id); |
1077 | if (!hdev) { | |
1da177e4 LT |
1078 | kfree(cl); |
1079 | return -ENODEV; | |
1080 | } | |
1081 | ||
1082 | ci = cl->conn_info; | |
1083 | ||
09fd0de5 | 1084 | hci_dev_lock(hdev); |
8035ded4 | 1085 | list_for_each_entry(c, &hdev->conn_hash.list, list) { |
1da177e4 LT |
1086 | bacpy(&(ci + n)->bdaddr, &c->dst); |
1087 | (ci + n)->handle = c->handle; | |
1088 | (ci + n)->type = c->type; | |
1089 | (ci + n)->out = c->out; | |
1090 | (ci + n)->state = c->state; | |
1091 | (ci + n)->link_mode = c->link_mode; | |
1092 | if (++n >= req.conn_num) | |
1093 | break; | |
1094 | } | |
09fd0de5 | 1095 | hci_dev_unlock(hdev); |
1da177e4 LT |
1096 | |
1097 | cl->dev_id = hdev->id; | |
1098 | cl->conn_num = n; | |
1099 | size = sizeof(req) + n * sizeof(*ci); | |
1100 | ||
1101 | hci_dev_put(hdev); | |
1102 | ||
1103 | err = copy_to_user(arg, cl, size); | |
1104 | kfree(cl); | |
1105 | ||
1106 | return err ? -EFAULT : 0; | |
1107 | } | |
1108 | ||
1109 | int hci_get_conn_info(struct hci_dev *hdev, void __user *arg) | |
1110 | { | |
1111 | struct hci_conn_info_req req; | |
1112 | struct hci_conn_info ci; | |
1113 | struct hci_conn *conn; | |
1114 | char __user *ptr = arg + sizeof(req); | |
1115 | ||
1116 | if (copy_from_user(&req, arg, sizeof(req))) | |
1117 | return -EFAULT; | |
1118 | ||
09fd0de5 | 1119 | hci_dev_lock(hdev); |
1da177e4 LT |
1120 | conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr); |
1121 | if (conn) { | |
1122 | bacpy(&ci.bdaddr, &conn->dst); | |
1123 | ci.handle = conn->handle; | |
1124 | ci.type = conn->type; | |
1125 | ci.out = conn->out; | |
1126 | ci.state = conn->state; | |
1127 | ci.link_mode = conn->link_mode; | |
1128 | } | |
09fd0de5 | 1129 | hci_dev_unlock(hdev); |
1da177e4 LT |
1130 | |
1131 | if (!conn) | |
1132 | return -ENOENT; | |
1133 | ||
1134 | return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; | |
1135 | } | |
40be492f MH |
1136 | |
1137 | int hci_get_auth_info(struct hci_dev *hdev, void __user *arg) | |
1138 | { | |
1139 | struct hci_auth_info_req req; | |
1140 | struct hci_conn *conn; | |
1141 | ||
1142 | if (copy_from_user(&req, arg, sizeof(req))) | |
1143 | return -EFAULT; | |
1144 | ||
09fd0de5 | 1145 | hci_dev_lock(hdev); |
40be492f MH |
1146 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); |
1147 | if (conn) | |
1148 | req.type = conn->auth_type; | |
09fd0de5 | 1149 | hci_dev_unlock(hdev); |
40be492f MH |
1150 | |
1151 | if (!conn) | |
1152 | return -ENOENT; | |
1153 | ||
1154 | return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; | |
1155 | } | |
73d80deb LAD |
1156 | |
1157 | struct hci_chan *hci_chan_create(struct hci_conn *conn) | |
1158 | { | |
1159 | struct hci_dev *hdev = conn->hdev; | |
1160 | struct hci_chan *chan; | |
1161 | ||
38b3fef1 | 1162 | BT_DBG("%s hcon %p", hdev->name, conn); |
73d80deb | 1163 | |
75d7735c | 1164 | chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL); |
73d80deb LAD |
1165 | if (!chan) |
1166 | return NULL; | |
1167 | ||
1168 | chan->conn = conn; | |
1169 | skb_queue_head_init(&chan->data_q); | |
168df8e5 | 1170 | chan->state = BT_CONNECTED; |
73d80deb | 1171 | |
8192edef | 1172 | list_add_rcu(&chan->list, &conn->chan_list); |
73d80deb LAD |
1173 | |
1174 | return chan; | |
1175 | } | |
1176 | ||
9472007c | 1177 | void hci_chan_del(struct hci_chan *chan) |
73d80deb LAD |
1178 | { |
1179 | struct hci_conn *conn = chan->conn; | |
1180 | struct hci_dev *hdev = conn->hdev; | |
1181 | ||
38b3fef1 | 1182 | BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan); |
73d80deb | 1183 | |
8192edef GP |
1184 | list_del_rcu(&chan->list); |
1185 | ||
1186 | synchronize_rcu(); | |
73d80deb | 1187 | |
76a68ba0 | 1188 | hci_conn_drop(conn); |
e9b02748 | 1189 | |
73d80deb LAD |
1190 | skb_queue_purge(&chan->data_q); |
1191 | kfree(chan); | |
73d80deb LAD |
1192 | } |
1193 | ||
2c33c06a | 1194 | void hci_chan_list_flush(struct hci_conn *conn) |
73d80deb | 1195 | { |
2a5a5ec6 | 1196 | struct hci_chan *chan, *n; |
73d80deb | 1197 | |
38b3fef1 | 1198 | BT_DBG("hcon %p", conn); |
73d80deb | 1199 | |
2a5a5ec6 | 1200 | list_for_each_entry_safe(chan, n, &conn->chan_list, list) |
73d80deb LAD |
1201 | hci_chan_del(chan); |
1202 | } | |
42c4e53e AE |
1203 | |
1204 | static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon, | |
1205 | __u16 handle) | |
1206 | { | |
1207 | struct hci_chan *hchan; | |
1208 | ||
1209 | list_for_each_entry(hchan, &hcon->chan_list, list) { | |
1210 | if (hchan->handle == handle) | |
1211 | return hchan; | |
1212 | } | |
1213 | ||
1214 | return NULL; | |
1215 | } | |
1216 | ||
1217 | struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle) | |
1218 | { | |
1219 | struct hci_conn_hash *h = &hdev->conn_hash; | |
1220 | struct hci_conn *hcon; | |
1221 | struct hci_chan *hchan = NULL; | |
1222 | ||
1223 | rcu_read_lock(); | |
1224 | ||
1225 | list_for_each_entry_rcu(hcon, &h->list, list) { | |
1226 | hchan = __hci_chan_lookup_handle(hcon, handle); | |
1227 | if (hchan) | |
1228 | break; | |
1229 | } | |
1230 | ||
1231 | rcu_read_unlock(); | |
1232 | ||
1233 | return hchan; | |
1234 | } |